I am testing a 2x2 set of data with chi-squared (expected values are all above 5, so I'm not using Fisher's exact test).
The there are two things being compared here. One has sample size 160, and one sample size 172. Data set:
GRASS, TARMAC P, G, P, G 172, 0, 106, 54
I'm comparing the values in grass and the values in tarmac. They have different sample sizes.
How do I present this when I am reporting it in my paper? N = what? Is it correct to write N = 172, 160?